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Tuning circuit having switchable capacitor controlled by a selection circuit

  • US 6,239,675 B1
  • Filed: 07/15/1999
  • Issued: 05/29/2001
  • Est. Priority Date: 04/28/1995
  • Status: Expired due to Term
First Claim
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1. A tuned capacitor circuit comprising;

  • a plurality of capacitors, each capacitor having a first and second terminal;

    a plurality of switching elements, each switching element coupled to a corresponding one of said capacitors, wherein each switching element includes a respective control terminal for rendering said corresponding switching element conductive;

    a first set of programmable switches, each of said programmable switches respectively coupled to the control terminal of a corresponding one of the switching elements;

    a second set of programmable switches, each of the programmable switches in the second set also respectively coupled to the control terminal of a corresponding one of the switching elements; and

    a selection circuit for providing a selection signal to either said first set of programmable switches or said second set of programmable switches wherein said first set of programmable switches comprises a set of jumpers.

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